学进去

One winter afternoon, a little mouse goes out ________ a walk. Suddenly the little mouse sees a hole (洞) . He thinks it ________ his friend's house. ________ he goes into it.

To his surprise (吃惊) , it isn't a mouse's ________ but a snake's. The snake (蛇) is ________ there. The little mouse is afraid and runs ________.

After the little mouse goes home, he tells his father about it. His father says," Don't ________ afraid. The snakes are our enemies (敌人) , but they won't catch us now. It's time for winter sleep. During (在……期间)the winter sleep, snakes ________ catch or eat anyone."